On the same micro-LED display panel, LED pixels are always operated with high and low biased voltages simultaneously to show different brightness and colors. Thus, it is vitally important to understand the effect of the heat transmission between LEDs under high and low biased voltages. In this work, we design two different LED groups: Group A is two LEDs bonded together for heat transmission and Group B is two LEDs separated from each other. Then, the two LEDs are operated at one fixed and one tuned biased voltage respectively in each group in a vacuum chamber and the efficiency of the two groups is studied both experimentally and numerically. Here, our experimental results demonstrate that Group A exhibits a maximum improvement of 15.36% in optical output power compared with Group B. The underlying reason is that the wall-plug efficiency of the LED with a voltage lower than photon voltage (V
CITATION STYLE
Lu, S., Zhang, Y., Qiu, Y., Liu, X., Zhang, M., & Luo, D. (2021). Efficiency Boosting by Thermal Harvesting in InGaN/GaN Light-Emitting Diodes. Frontiers in Physics, 9. https://doi.org/10.3389/fphy.2021.752476
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